DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 677

• Manufacturer Part Number: DF2148RTE20IV
• Description: MCU 5V 128K I-TEMP,PB-FREE, 100-
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148RTE20IV

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: Host Interface, I²C, IrDA, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 74
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Also, the bypass capacitors connected to AVCC, AVref and the filter capacitor connected to AN0
to AN7 must be connected to AVSS.
If a filter capacitor is connected as shown in figure 20.7, the input currents at the analog input pins
(AN0 to AN7) are averaged, and so an error may arise. Also, when A/D conversion is performed
frequently, as in scan mode, if the current charged and discharged by the capacitance of the
sample-and-hold circuit in the A/D converter exceeds the current input via the input impedance
(R
when deciding the circuit constants.
Table 20.5 Analog Pin Ratings
Note:
Item
Analog input capacitance
Permissible signal source impedance
in
), an error will arise in the analog input pin voltage. Careful consideration is therefore required
Notes:
*
* When V
1
Figures are reference values.
1.
2. R
*
1
10 µF
in
Figure 20.7 Example of Analog Input Protection Circuit
CC
: Input impedance
= 4.0 to 5.5 V and
R
in
*
2
0.01 µF
100
0.1 µF
12 MHz.
Min
—
—
AVCC
AVref
AN0 to AN7
AVSS
Rev. 4.00 Sep 27, 2006 page 631 of 1130
Max
20
10 *
Section 20 A/D Converter
REJ09B0327-0400
Unit
pF
k